在iOS 7中使用相机时，应用因内存压力而终止 [英] App Terminated due to Memory Pressure when using camera in iOS 7

问题描述

当我使用UIImagePickerController Camera捕获一些图像时，我面临由于内存压力 App终止的错误。

I am facing error App Terminated due to Memory Pressure when I capture some images using UIImagePickerController Camera.

我首先收到内存警告然后突然app崩溃了。这个问题在iOS 7中特别适用于iOS 6，它工作正常。

I receive memory warnings first and then suddenly app crashes. This issue is in iOS 7 specifically as in iOS 6 it is working fine.

有人知道为什么在使用相机的iOS 7中会出现此内存问题。

Does someone know why is this memory issue occuring in iOS 7 on using camera.

注意：我试图最小化RAM使用率，因为它也可能是造成此内存压力的原因。但仍然收到警告。

Note: I tried to minimize RAM usage because it may also be the reason for this memory pressure. But still getting warning.

推荐答案

我刚刚在类似帖子上发布了这个答案（ iOS 7 UIImagePicker预览黑屏）。这就是我所说的：

I just posted this answer on a similar post (iOS 7 UIImagePicker preview black screen). Here's what I said:

大约5个月前，我的团队发现了UIImagePickerController的内存泄漏。每个实例化都以指数方式减慢app的速度（即第一个alloc-init延迟1秒，第二个延迟2秒，第三个延迟5秒）。最终，我们有30-60个延迟（类似于你遇到的情况）。

About 5 months ago my team discovered a memory leak with UIImagePickerController. Each instantiation slowed down the app exponentially (i.e. first alloc-init had a 1 second delay, second had a 2 second delay, third had a 5 second delay). Eventually, we were having 30-60 delays (similar to what you're experiencing).

我们通过继承UIImagePickerController并使其成为Singleton解决了这个问题。这样它只被初始化一次。现在我们的延迟很小，我们避免泄漏。如果子类不是一个选项，请在viewController中尝试一个类属性，只是懒得加载它。

We resolved the issue by subclassing UIImagePickerController and making it a Singleton. That way it was only ever initialized once. Now our delay is minimal and we avoid the leak. If subclassing isn't an option, try a class property in your viewController and just lazy load it like so.

-(UIImagePickerController *)imagePicker{
    if(!_imagePicker){
        _imagePicker = [[UIImagePickerController alloc]init];
        _imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
}
    return _imagePicker;
}

然后您可以稍后再调用它：

Then you can just call it later like:

[self presentViewController:self.imagePicker animated:YES completion:nil];

据我所知，这只是iOS 7中UIImagePickerController的一个问题。以前的版本似乎没事。

From what I could tell, this is just an issue with the UIImagePickerController in iOS 7. Previous versions seems to be fine.

这篇关于在iOS 7中使用相机时，应用因内存压力而终止的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！